I purchased a clarion rd3 iphone adapter. It costs roughly 30 pound and plugs into the port that the cd changer would use and allows you to use the steering wheel controls there is also a 3.5mm aux version but obviously it would not allow use of steering wheel skip function. You can find the product...

1922394_10202916687893904_58830741_n.jpg Just bought myself an 04 1.6 quicksilver cc with 45000 on the clock, love it. Just got to change the heater resistor block so i can use a speed other than 4 :lol: and get the boot and glove box interior lights working again and it'll be like it just came out...